ANOVA: How many groups?

You are about to enter your data for a ANalysis Of VAriance.
For this to make sense you should have several groups
of data (at least 3; maximum: 26).
Number of groups:

Each group includes a certain number of data items
(minimum:3, maximum: 1024). (Often
all the groups have the same number of items, but that is not required.)
You will be asked to enter this data into the appropriate box.
If you have lots of data you may want to copy the data from a different
screen and paste it into the correct box. You can also just type in the points
separated by spaces, tabs, or commas.
Boxes left completely blank will be ignored.